Birds with webbed feet are called waterfowl. All waterfowl are members of the order Anseriformes, and most of them are members of the family Anatidae. Some waterfowl species include ducks, swans and geese. Broader definitions of the term "waterfowl" sometimes include marine birds, such as seagulls, pelicans and herons.
Waterfowl are characterized by their webbed feet, migratory behavior and rounded beaks known as bills. These adaptations allow waterfowl to thrive in aquatic environments, with many birds spending the majority of their life on or around the water. Many waterfowl dive and catch fish and frogs from bodies of water with their broad bills.